> Very useful to let AI summarise a large wall of text when browsing Hacker News for example

This right here is why I'm against LLMs big time.

Walls of text are long for a reason. Yes, many of them might have filler. But sometimes there is nuance in the filler that a summarizer will happily throw away.

I don't want long form to be Instagrammified --- condensed into a ten-second paragraphs with 40% of the details that perfectly fits an endless consumption model that's perfect for advertising.